Device and method for finely adjusting and controlling confined water under lining plate of excavation channel

Abstract

The invention provides a device and method for finely adjusting and controlling confined water under a lining plate of an excavation channel. The device comprises a submersible pump, a water pressure sensor, a water pump inlet pipe, a water pump outlet pipe, a sealing plug, a controller and a monitoring terminal; the submersible pump is arranged below the water surface in a cofferdam; the water pump inlet pipe and the water pump outlet pipe are connected with the submersible pump; a drain hole is arranged at the bottom of the lining plate of the channel; the water pump inlet pipe and the water pressure sensor are wrapped by the sealing plug, and connected with the drain hole at the bottom of the lining plate of the channel, so that sealing is formed; the submersible pump is connected with a controller through a first cable; the water pressure sensor is connected with the controller through a second cable; and the controller is connected with the monitoring terminal through a third cable. The device in the invention is small in volume, movable, and simple and convenient to install; the device is arranged in the cofferdam in need of overhaul of confined water channel under an excavation lining; therefore, the fact that the water pressure under the lining plate is finely adjusted and controlled can be realized; and thus, the security and the stability of the lining plate in an overhaul period can be ensured.

Description

technical field [0001] The invention relates to the field of maintenance of excavated canal sections such as the middle line project of the South-to-North Water Diversion Project, in particular to a device and method for finely controlling pressurized water under lining slabs of excavated channels. Background technique [0002] Confined water seepage control is an important guarantee for the stability and safety of lining slabs in excavated channel sections such as the middle line of the South-to-North Water Diversion Project. Usually, in excavated canal sections with underground confined water, vertical and horizontal permeable plastic pipe networks are laid in the sand cushion under the channel lining board, and check valves are installed at the toe of the slope or at the intersection of the pipe network in the middle of the canal floor. The check valve realizes the automatic drainage and decompression of the underground pressurized water, so as to ensure that the lining p...

AI Technical Summary

Problems solved by technology

[0007] The invention provides a fine control device for pressurized water under the lining slab of an excavated channel, which solves the problem of the anti-floating instability of the lining slab that may occur in the construction process of the dry land maintenance of the cofferdam under the condition of uninterrupted water delivery in the excavated canal section of the South-to-North Water Diversion Project; Control the start and stop of the water pump according to the safety threshold of the pressurized water under the lining slab, the water pressure sensor can realize the precision control of the water pressure at 1mm level, realize automatic real-time dynamic drainage and decompression, and ensure the safety and stability of the lining slab during maintenance; the present invention is also to solve the problem The special operation and maintenance environment in which the central line of the South-to-North Water Diversion Project cannot be cut off for maintenance was proposed for the first time, filling the gap at home and abroad

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